Electrical charges and energies of cement and pozzolan particle surfaces

Abstract

The aim of this study was to identify interaction mechanisms among particles in the hydration of pozzolan cements. To this end, chemical, physical, mineralogical and electrokinetic analyses of samples were conducted. Furthermore, free surface energy components were defined by Van Oss, Chaudry and Good equations and the contact angle values of samples were determined by using the thin layer wicking method. The results show that the addition of water turns solid–air interfaces into solid–liquid interfaces (wetting), while attraction and repulsion take place depending on the electrical charges on particle surfaces. While total surface energy and components of particles seek to attain balance as a result of wetting, hydration and pozzolanic reactions occur.

Editorial

“…A combination of the two techniques gave information on the specific surface area, pore volume and pore size distribution. As the authors say 'the hydrates filling process can be best captured by total MIP pore volume and the SSA values are more related to calcium-silicate-hydrate growth'.The next paper (Tasci and Yılmaz, 2016) shifts the focus from later-age properties to early-age performance. The authors have looked at the interparticle interactions between cement particles and pozzolans, performing chemical, physical, mineralogical and electrokinetic analyses of samples.…”

“…The next paper (Tasci and Yılmaz, 2016) shifts the focus from later-age properties to early-age performance. The authors have looked at the interparticle interactions between cement particles and pozzolans, performing chemical, physical, mineralogical and electrokinetic analyses of samples.…”